US2072160A - Weaving loom for continuous weaving in which the weft is inserted by means of pirnless shuttles - Google Patents

Description

March 2, 1937. w s 2,072,160

- WEAVING LOOM FOR CONTINUOUS WEAVING IN WHICH THE WEFT IS INSERTED BY MEANS OF PIRNLESS SHUTTLES Filed June 17, 1933 3 Sheets-Sheet 'l I Ill/r1111.

ATTORNEYS March 2, 1937. R D A 2,072,160

WEAVING LOOM FOR CONiINUOUS W EAVING IN WHICH THE WEFT IS INSERTED BY MEANS OF PIRNLESS SHUTTLES Filed June 17, 1933 3 Sheets-Sheet 2 I N VENTO R R0 wwo/v flaws ATTORNEKS March 2, 1937. R DEwAs 2,072,160 WEAVING LOOM FOR CONTINUOUS WEAVING IN WHICH THE WEFT IS INSERTED BY MEANS OF PIRNLESS SHUTTLES Filed June 17, 1933 3 Sheets-Sheet 3 r INVENTOR BY Farm/v0 fifms m4 ATTORNEYS 55 the'inserter andthe selvedge is folded into the Patented Mar. 19361 TMUNITTED. sTATJ'Es 2,072,160 .WEAVING LOOM Foa CONTINUOUS WEAV- JNG IN WHICH THE WEFT IS INSERTED BY MEANS OF nameless SHUTTLES Raymond Dewas, Amlens, France 1 Application June 17, 1933, Serial No. 676,251

In France June 23, 1932 I The present invention relates to improvements to the invention described in my pending U. 3. application filed May 31, ,1933, Ser. No. :673,672, Y for improvements in Weaving looms for con-r 5 tinuous weaving in'whichthe weft is inserted by means of pirniess shuttles;

v The improvements which arethe'object of the present invention have for their aim the possibility of allowing the weft to pass'altemately from either side of the loom by means of weft threads fed from two large bobbins of which one is arranged on eachside of Ithe'selvedges. a

As in my above-mentioned application, these improvements enable looms which are, provided with them to work at a very high speed and. in

any position, horizontal, oblique or vertical, in, that the insertion member with equal facility can be thrown acrossthe shed horizontally, ob-

, liquely or vertically. J

A The improvements also enable the shuttle to be thrown alternately from each side of the loom,

eitherby throwing devices arranged at each side of the selvedges and provided with discs of the type described in the-above mentioned application, or by means of picking sticksor rods of the already known type, or finally, by means of electro-magnets in which the direction of. the current would be alternately reversed, etcf:

Further, the improvements make it possible by using the members describeddn the above-mentioned application but disposing them symmetrically on each side, of the selvedges, to'present' 5 the weft andto release it, as well as to cut the weft vdth or without turning-in the end of the preceding shoot whereby the selvedges may or may not be formed, as the .case may be. r

Finally, these improvements can be employed on looms having shuttle boxes which form part 7 of the sley, or which are rigidly fixed, so that the reed and the sley, which may or may n'ot include a shuttle raceare the only movable parts. I In'accordance with the invention described in ,the above entitled patent application, the process of insertion ofth'e weft in the shed, in a single weft thread coming from a stationary bob= bin, with a fast'selvedge is aracterized by the feature that the weft thread stretched in front of and across the opening of the shed, between the selvedge and the weft bobbin, and is seized by the weft inserter a fter this inserter has been driven and at the time of its entry into the shed, and is cut by a cutting device which is integral withthe' inserter,in such a manner that the portion of weft thread which lies between "vice.

of the cloth, isbeing bent into the entrance of in Claims. (c1. 139-125) j, shed by the inserter entering the saidlshed, so

as to form the fast selvedge, and that the portion of weft thread which lies between the inserter and the bobbin, from which the weft thread can run off or unwind, is passed into the same shed 5 as a single thread and is released from the inserter when it comes out of the shed. r i This process, when a fast selvedge on one side of the fabric is not required, is characterized by r tegral with the inserter but is arranged exter- 15" nally and in front of the openingof the shed between the point of the fell of the cloth and the path of the inserter,'in such a manner that the portion of weft thread which lies betweenthe inserter and the point of the fell of the cloth 20 with the selvedge remains free outside ofthis point. Furthermore, the portion of weft thread which lies between the inserter andthe bobbin, from which the weft thread can run off or flunwinditself, is placedinside thesame shed as-a single .thread and released from the inserter when it comes, out of the shed.

In certain cases, in order to insert 'in one of 'the selvedges one end of thread only out of two, I

As aweft inserter is shot into the shed, thev weft stretched on its path is.caught into the two.prongs of the rider-and held between the 40 springy prongs of the amp. As the inserter is continuing its stroke along into the shed, the weft, stretched between the eyelet and the fell the shed. 15

Under the tension of the thread thus bent, as the inserter progresses, the said thread slides between the springy branches of the clamptill it comes into contact upon the edge of the-cuttingblade, where it is cut.v t

Thethus severed thread, allows the inserter to continue its stroke. The part of said -se vered thread, which is still heldin the clamp and goes up to the bobbin, is carried along the shed toconstitute the .next pick, and the part of same its said severed thread which goes up to the fell of the cloth, remains in-turned into the entrance of the shed, to form the fast selvedge. I

It is understood that, the passing of the weft woven-material and at a later stage be sheared g In order to explain the present invention more C fully, and by way of anexample' of the applies-- 7'5; tioniof the improvements which are its object,

several arrangementsare described hereinafter and shown diagrammatically in the accom panying drawings in which:

Figure 1 is a side elevation of theweft inalternately from each side of the loom, renders serting member; i v a unnecessary the use of the unidirectional closed Figure 2 isa plan view of the same, weft incircuit employed for the passing of the weft serting member showing the surface which slides from one side only of the loom, since both the along the reed and also showing the gripping ends of the conduit which are 'adjacent'to each clamp which is ca1ried by the member, andselvedge may be used as shuttle boxes; the dewhich is adapted to grip' the weft thread at both 10- vice provided with discs, which throw the shutend i tle across the shed and back in the cdnduit for Figure 3 is a plan view of the same weft incompleting the circuit, also can be used equally sertixg member showing the surface which W ll f r h w n the shoot alternately, it being 'faces the fell of the cloth, and illustrating theunderstood that in this case the discs of the two slots and the central groove with which the 15 above mentioned device are operated in such a member is provided; v manner that they will rotate in the opposite di- Figure 4 is an end view of the safiie weft inrection. 1 serting member; I

- These improvements, which are the object Of Figure 5.15 a, fragmentary plan view of the I the present invention, relate, among others, to warp, of the sley, of the end of the conduit 20 the following elements: I I which 'constitutesthe shuttle box, and of the 1- The member for insertin h Weft, 0r pirnmovable members which present and release the 165$ Shuttle, which is 50 arran e that it can gripv I weft, the presenting member being in position the weft alternately on each side of the loom, cut 1 for gripping the weft, the weft inserting member it and re i A being shown at its entry into the shed, the throw- 25 2. The members which present, release and in'g device with discs or the like not being shown sever the weft. v v in this figure;

As regards the member'for. inserting the weft Figure 6 is a corresponding side elevation I or pirnless shuttle, which, according to the presviewed from the end of the warp;

Q ent invention, is adapted to insert the weft al- Figure 7; is a plan view similar to Figure 5 ternately from each side of the loom, this is 'sim-' and showing the insertion member continuing its ilar to the insertion member described in the, coursethrough the shed; J a above mentioned application and consists of a Figure 8 isa plan view similar to Figure 5,

n rectilinear piece, preferably of metal, having an showing the insertion member at the end of its essentially triangular or trapezoidal cross sec return journey after having been thrown ir ,35.

tion and which is split vertically in its; middle the other selvedge, the'movable, members for plane at each end, for a certain length; while presenting and releasing the weft aving been so the central part which remains solid i' s prodisplaced that the releasingblade is in-juxtaposivided on the side which faces the reed with a tion with the'central slot and the clamp, while central groove in which isarranged a resilient the presenting member is out of the pathof the. :10 clampwhich can grip the weft thread from both Y said insertion member for transporting the ends, as will be explained hereinafter. weft; I

. As regards the members for presenting and Figure 9 is a corresponding side elevation.

' releasing the weft, according to the present in yiewed from the end of the warp; vention, they consist, as in the above mentioned Figures 10 and 11 are similar views to Figures 45 application, of an eyelet through, which passes 5 and 6, showing the arrangement of the cutting the weft thread coming from the bobbin and of member fixed adjacent to a selvedge, when the a blade for pushing apart the prongs of the cutting member is arranged independently of the clamps, an eyeletand'a blade being arranged insertion member; t H a on each side of the selvedges. Figure 12 shows in elevation an alternative The said members are mounted on movable design for the member for inserting the end of supports adapted alternately-to move the eyelet the weft, when this memberis intihded to cointo position for passing the weft thread on to opcrate with fixed presenting and rel easing memtheshuttle at the moment when the said shutbersfor the weft; v

551118 enters the shed to pass the end of the thread Figure 13 is a plan view "oi the'weft inserting through it, and rto move the blade into'position member, sho g-the surface which slides along' fl for forcing apartthe prongsof the resilient clamp the reed; an r I oi. the shuttle when thesaid shuttle, thrown from- Figure 14 1s a plan view of the weft inserting the opposite selvedge, has traversed the shed and member shown in Fig. 13 and shows the surface I carried the end of the weft through it. which faces the fell d!v the cloth; I ,60

As cbncems the cutting members, these are Figure l5 is an end view, looking at the left 1 the same as mentioned in the above mentioned hand' end of the inserting member of Figure 13 application and consist of cutting blades either Figure 16 is'the sameview from the right hand arranged in theshuttle itself beneath the level end; I I I,

of the clamp, there being one blade for each Figure 1'7' shows diagrammatically a resilient- 5 direction of the motion of the shuttle, in order to, clamp carried'by the weft inserting member; f enable selvedges to be formed by bending back Figure 18 is a sectionjalong the line li -l8 of i the ends of the preceding-shoots; or fixed on Fig. 17. I w I theloom at each side of the .selvedges, if the Figuresl to4-, show the inserting member I for ends of the weilft are to remain outside of the the 'weft, lwhich consists of arectilinear piece of o metal, preferably having a triangular or trapezoidalcros's section, (Fig. 4) and provided with vertical slots 2' and 3 (Figs; 2 and 3), while the middleipart, which is' solid is provided, upon the face which slides on\ the reed, with a central groove 4 which connects the two central opposite slots2and3.

In this groove or slot I the clamp for holding the weft thread is arrangedfsaid clamp being shown separately in Figs. '17 and 18, and com: prising two straight flexible steel prongs 5 arranged parallelly and in elastic contact, the one against the other, in the centre of the groove 4, so as not to come into contact with the walls of thesaid groove, the ends 5a of these prongs .being bent back towards the said walls in which they are embedded so as to maintain the clamp in position, so that the weft thread or the releasingblade which is,arranged on either side of the-selvedge can enter and pass between the prongs, 5 of the clamp either from one end or from the other, the elasticity of the contact between the two prongs-5 being increased, by means V of auxiliary springs 6.

Below this clamp, the ends of which may be extended into the slots 2 and 3, a cutting blade i (Fig. *3) is arranged'in the bpttom of each of the said 'slots. I

According to Figures '5 to 9, which have refer- --en0e to the members which present, release and cutthe, weft, these members comprise an eyelet 8 and a flexible blade 9, (Figs. 6 and 9), which are always placed together in groups and in such manner that onesuch group is arranged near each selvedgeof the wovenmaterial.

' Each group of members 8 and 9 is mounted on a movablesupport l0 which slides, for example, in one of the caps ii of the reed l2 and is controlled byga cam or lever not shown inthe drawings and operated in conjunction with the ber l is, thrown into the shed, Figs. 5 and 6, the

weft inserting memberl is situated at the end oi the conduit l3 (Figs. 5, 7, and 8) which forms the shuttle box- (the throwing member with I discs or the like, is not shown in the drawings),

the support I!) is in the position shown in Fig. 6, said'support moving the blade 9 into an inoperative position and the eyelet 8 into a position where it presents the thread which passes from the point of the fell of the cloth M to the bobbin t5; the thread passes'into one of the slots 2 or, 3 of the weft inserting member |,and is held between the prongs 5 of the clamp where the thread remains fixed until it arrives at the other selvedge. By the operation of the adjacent cutting blade I, which is arranged in the slot 2'or the slot 3 of the weft inserting member I, the weft is then cutwhile the end ofth'e preceding shoot is bent .back towards the inside of the shed for the pu'rposeof forming a selvedge. 7 Fig. 7 shows the weft inserting member I while it is passing through the shed. a I 7 When the shoot has almost passed through, the weft inserting member i has reached the end of its travel (Figures 8 and 9) the support llliFig.

9} having, been displaced in such a way as to place the eyelet8 outside the path of movement or the 'member I, thus moving aside the weft,

thread between'the point of the'fell of. the cloth and the bobbin, the blade a'thereby having been of the other.

brought inn) juxtaposition with pne ofthe slots 2, or -3 of the weft inserting member I; -the .blade 9 penetrates between the prongs 5 ore-the clamp and moves them aside thus releasing the end of the shoot which has been passed-across .the shed, and which comes outthmugh the opposite slot whilst the weft inserting member I enters its box. f

In the position shown in Fig. 8, the weft passes above the weft inserter, as it is raised by the eyelet 8 off the path of the inserter, as in Fig. 9, so as to permit said inserter to pass-onto! the shed) into the conduit- 13, the releasing blade 9 having been brought in line with the groove 4 of the inserter' I (Fig. -9).

When the i'nserter works on the reversedirection; it comes out of the box l3, and catches the thread which is stretched between the point of, the fell of the cloth II and the bobbin l5 through the eyelet 8 which has been lowered, as shown inFi gsjand M for actuating the movable support Any means Ill sliding in one of the caps of the reed 12, may

be employed. 1

A device of asomewhat difierent construction blades i. Instead of theseblades, a cutting blade i8 is operatively arranged on a support, adjacent each, side of the selvedges (Figures 10 and 1,1) and cuts the weft as described in the above men tioned patentapplication Ser; No. 673,672. 7

It is understood thatwithout departing from the spirit of .the present invention, changes, modifications or improvements canbe made and: in the same way equivalent means can beapplied.

' Thus, for example, the single clamp 5of the weft inserting member i, could be replaced by two clamps, one being arranged in the extension In the same way, for example, and shown in Figures 12 to 16, the weft inserting member I ,is illustratedmin Figures .10 and 11 of the drawcould have the'same shapeand cross section as the member shown in Figures 1 to 4, with thediiierence that its two end slots 2' and 3?; are oblique in relation to the height of the member and issue on the side which slides along the reed i2 (Figs; 6, 9, and 1'1)..to the right and to the left ofl the centre line, there beingthe further difierence that each of these slots communicates with a groove 4' or t" respectively, anged also to the right and to the leftrespe ively of the centre line, the said slots 2' and 3" issuing, on the side towards the fell of the cloth, on or very nearto the centraLplane of the weft inserting -member i'.

Two clamps 5' and 5" formed in th'e same way as the clamp 5 are arranged in these slots, so as to allow the releasingblade 9 to pass With this modified type of inserting member i- 4 the eyelets 8 and the blades 9 for presentingand releas ng the weftare fixed and arranged on fixed supports on each side of the selvedges, in such a 'way'that, as regards thegroup relating to the right selvedge, th'e eyelet is in line with the slot 2' and the groove 4', whilst the blade is in line with the slot 3' and the; groove/4C", sathat it is able to separate the prongs of the clamp 5" when theweft inserting member which is thrown from the left selvedge, leaves the right selvedge to reenter its box. Theweft thread; which is not able to penetrate the groove 4', slides underneath the T- weft inserter while thellatter -is ice-entering its. 1

box. Then'the weft inserter. is drawn irom right 15 entering its box.

thrown "from left to rightyth'e, thread which is v to left; the thread which is lightly stretched is able to penetrate the slot. 2' in the course of this movement, reaching the clamp and is cut by the cutting blade- H 1 5 As regards the group relating to the left selvedge, the eyelet is arranged in line with the slot 3 and thegroove 4", whilst the blade is in line withthe slot 2 and the groove 4' so that it is able to separate the prongs of "the clamp 5' when the weft inserting member I which is thrown from the right selvedge, leaves the left selvedge to re-enter its box. The weft thread, which is not able to penetrate the groove 4" slides above the weft inserter while the latter is re- Then the weft inserter is lightly stretched, is able to penetrate the slot 3' in the course of this movement, reaching the clamp 5", and is cut by the cutting blade. I claim: r I

1. In shuttlelesslooms for continuously feeding the weft shots, in combination with a shed, and a pair of bobbins placed on both sides of the loom, the weft threads fed from said bobbins being stretched in front of .both ends of the shedlfrom the selvedges of the last pick at the fell of the i X cloth to said bobbins: a device for inserting single wefts and weaving from both sides of the loom,

' said device comprising a weft inserter for alternately gripping said threads, cutting means carried by said weft inserter, that part of each weft thread which alternately stands between the'weft weft, and means for releasing the last-mentioned part of the weft from said weft inserter after it 40. has passedthrough the shed.

2. In a weft inserting device, a weft inserter having a. metal body of a substantially angular -cross-section, said-body being split vertically at its two ends, whereby 'a double pronged rider having two slots is: formed, and meansforming a the'weft shots, in combination with a shed, and

-" groove {in said body, said groove extending'lon tudinally between and connecting the saidslots, whereby the weft ,thread why pass through said opposing slots. 1

3. In a weft inserting devibe, a weft inserter havinga metal body of a substantially angular cross-section said :'body' being split. vertically in its middle plane at its two ends, whereby a double pronged rider having two slots is formed, 55.the middle portion of said body having a longi- "tudinal central groove, saidgroove being in. the longitudinal central plane passing through said slots, and a' clamp carried by said weft inserter andsituated in said groove; said clamp comprisco ing two parallel resilient prongs which are in 1 contact with each-other, the ends of said prongs being bent toward the walls of said groov to 1 maintain said clamp in position'in the middle of said-groove. L Y

4. In a weft inserting andcutting-device, a "weft inserter havinga meta i r of a substantially angular cros'ssection' d body being split vertically in its middle plane. at its two ends",

whereby-a double pronged rider having two slots is formed, the middle portion of said body having a'longitudinal central groove, said groove being in the longitudinal central plane passing through n said slots a clamp carried by said weft inserter and situated in said groove, said clamp comprising .1 two'parallel resilient prongs which areincontact with each other, the ends of said prongs being bent toward the wallt of said groove to maintain said clamp in position in the middle of said groove, and a pair of cutting blades carried by said weft inserter, each blade being situated at the bottom 5 4 from the selvedges of the last pick at=- the fell'cf the cloth to said bobbins; a device for inserting singlewefts and weaving from both sides of the i5 loom, said device, comprising a weft inserter for alternately gripping said'threads, said weft,v inserter having a metal body of a substantially angular cross-section, said body beingsplit vertically atits two ends, whereby a double pronged 20 rider having two slots is formed, the middle 'po'r-r tion ofsaid body having a longitudinal central groove, said groove being in the longitudinal cen'- tral plane passing through said slots, a clamp carried by saidweft inserter and situated in said 25 groove,-said clamp comprising two parallel resilient prongs 'whichare in contact with each other, the ends of said prongs being bent toward the walls of said groove to maintain saidclamp in position in the middle of said groove," cutting 30 means carried by said weft, inserter, that part of i e ch weft thread which alternately stands 56-,

, een the weft inserter and the selvedge being bent into the shed by the weft inserter while said situated between its bobbin and the weft inserter being'passed by said weft inserter through said shed as a single weft, and a pair of movable weft releasing blades, each blade being adaptedto pass through a separate slot and penetrate between,40 thefresilient prongs of the clamp as the weft inserter comes out of the shed to releasethe lastmentioned part of the weft from said weft inserter after it has passed through the shed. i r

6. In shuttleless looms; for continuously feeding 45 serting single wefts and weaving from both sides.

of the loom, said device comprising a weft in-; serter foralternately gripping said threads, cutting means carried by said weft inserter, that 55 part of each weftthread which alternately stands between the weft inserter and the selvedge being bent into the shed by the weft inserter while ing the weft shots, in combination with a shed,

and-a pair of bobbins placed on both sides ,ofthe. a

' loom, the weft threads fed from said bobbins being stretched infront of both ends of the shed from the selvedges of thelast weft inserter enters the shed, the part of the weft 3 I pick at the fell of the cloth to said bobbins; a device for inserting single wefts and weaving from both sides of the loom, said device comprising a weft inserter for alternately gripping said threads, cutting means carried by said weft inserter, the part of the weft situated between its bobbin and the weft inserter being passed, by said weft inserter through said-shed as a single weft, a pair of weft releasing blades, each blade being adapted to pass through a separate slot and penetrate between the resilient prongs of the clamp as the weft inserter comes out of the shed to release the last-mentioned part of the weft from said weft inserter after is has passed through the shed, a pair of movable thread guiding eyelets "'siutated at both ends of theshed, said eyelets placing the threads stretched between the fell of the cloth and the bobbins alternately in and out of the path of the weft inserter, and a pair ofmovable supports, each support carrying a releasing blade and a guiding eyelet.

8. In shuttleless looms for continuously feed: ing the weft shots, in combination with a shed, and a pair of bobbins placed on both sides of the loom, the weft threads fed from said bobbins being stretched in front of both ends of the shed from the selvedges of the last pick at the fellof the cloth to said bobbins; a device for inserting single wefts and weaving from both sides of the loom, said device comprising-a weft inserter having gripping means at each end for alternately gripping said respective threads, cutting blades mounted independently of the inserter on both sides of the selvedges at the entrances to the shed between the point of the fell-of the cloth and the path of the inserter for cutting a weft extending between the selvedge and a bobbin close to the selvedge, the leading end of the part of the weft extending to the bobbin being gripped by said inserter and passed thereby through said shed as a single weft, and means for releasing the last-mentioned part of the weft from said weft inserter after it has passed through the shed.

9. In shuttleless looms for continuously feeding the weft shots in combination with a shed, a reed and a pair of bobbins placed on both sides bins being stretched in front of both ends of the shed from the selvedges of the last pick at the fell of the-cloth to said bobbins; a device for insertingsingle wefts and weaving from both sides of the loom, said device comprising a weft .inserter for alternately gripping said threads, said weft inserter comprising two slots situated to the right and left of the central lineof the weft,

inserter and extending obliquely with respect to the height of the weft inserter toward that surface of theweft inserter which slides along the reed, a pair of; grooves being formed on' a surface of the weft inserter, each groove forming a. continuation of a separate slot, a pair of clamps for gripping the weft and carried by the weft inserter, each clamp being situated in a separate slot, 9. pair of cutting blades carried by said weft inserter, each cutting blade being situated at the bottom of each of the slots, a pair of fixed eyelets situated at both ends of the shed, and a pair of fixed weft releasing blades situated-at both ends of the shed. v

10. In shuttleless looms for continuously feedlng the weft shots, in combination with a shed, a reed and a pair of bobbins placed on both sides of the loom, the weft threads fed from said bob-' bins being stretched in front of both ends of the shed from the selvedges of the last pick at the fell of the'cloth to said bobbins; a device for inserting single wefts and weaving from both sides of the loom,'said device comp'rising a weft inserter for alternately gripping said threads, said; weft inserter comprising two slots situated to the right and left of the central line of the weft inserter and extending obliquely with respect to the height of the weft inserter toward that surface of the weft inserted which slides along the reed, a pair of grooves being formed on a surface of the loom, the weft threads fed from said bobof the weft inserter, each groove forming a continuation of a separate slot, a pair of clamps for gripping the weft and carried by the weft inserter, each clamp being situated in a separate slot, a pair of cutting blades operatively arranged at both edges of the cloth adjacent the selvedges,

a pair of fixed eyelets situated at both ends of the shed, and a pair of fixed weft releasing blades situated at both ends ofthe shed.

RAYMOND DEWAS.

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